129 lines
3.8 KiB
Arduino
129 lines
3.8 KiB
Arduino
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/*
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WiFiEsp example: WebServerAP
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A simple web server that shows the value of the analog input
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pins via a web page using an ESP8266 module.
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This sketch will start an access point and print the IP address of your
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ESP8266 module to the Serial monitor. From there, you can open
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that address in a web browser to display the web page.
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The web page will be automatically refreshed each 20 seconds.
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For more details see: http://yaab-arduino.blogspot.com/p/wifiesp.html
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*/
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#include "WiFiEsp.h"
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// Emulate Serial1 on pins 6/7 if not present
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#ifndef HAVE_HWSERIAL1
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#include "SoftwareSerial.h"
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SoftwareSerial Serial1(6, 7); // RX, TX
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#endif
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char ssid[] = "TwimEsp"; // your network SSID (name)
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char pass[] = "12345678"; // your network password
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int status = WL_IDLE_STATUS; // the Wifi radio's status
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int reqCount = 0; // number of requests received
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WiFiEspServer server(80);
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// use a ring buffer to increase speed and reduce memory allocation
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RingBuffer buf(8);
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void setup()
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{
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Serial.begin(115200); // initialize serial for debugging
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Serial1.begin(9600); // initialize serial for ESP module
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WiFi.init(&Serial1); // initialize ESP module
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// check for the presence of the shield
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if (WiFi.status() == WL_NO_SHIELD) {
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Serial.println("WiFi shield not present");
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while (true); // don't continue
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}
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Serial.print("Attempting to start AP ");
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Serial.println(ssid);
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// uncomment these two lines if you want to set the IP address of the AP
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//IPAddress localIp(192, 168, 111, 111);
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//WiFi.configAP(localIp);
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// start access point
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status = WiFi.beginAP(ssid, 10, pass, ENC_TYPE_WPA2_PSK);
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Serial.println("Access point started");
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printWifiStatus();
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// start the web server on port 80
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server.begin();
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Serial.println("Server started");
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}
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void loop()
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{
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WiFiEspClient client = server.available(); // listen for incoming clients
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if (client) { // if you get a client,
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Serial.println("New client"); // print a message out the serial port
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buf.init(); // initialize the circular buffer
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while (client.connected()) { // loop while the client's connected
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if (client.available()) { // if there's bytes to read from the client,
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char c = client.read(); // read a byte, then
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buf.push(c); // push it to the ring buffer
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// you got two newline characters in a row
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// that's the end of the HTTP request, so send a response
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if (buf.endsWith("\r\n\r\n")) {
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sendHttpResponse(client);
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break;
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}
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}
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}
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// give the web browser time to receive the data
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delay(10);
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// close the connection
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client.stop();
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Serial.println("Client disconnected");
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}
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}
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void sendHttpResponse(WiFiEspClient client)
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{
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client.print(
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"HTTP/1.1 200 OK\r\n"
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"Content-Type: text/html\r\n"
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"Connection: close\r\n" // the connection will be closed after completion of the response
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"Refresh: 20\r\n" // refresh the page automatically every 20 sec
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"\r\n");
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client.print("<!DOCTYPE HTML>\r\n");
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client.print("<html>\r\n");
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client.print("<h1>Hello World!</h1>\r\n");
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client.print("Requests received: ");
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client.print(++reqCount);
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client.print("<br>\r\n");
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client.print("Analog input A0: ");
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client.print(analogRead(0));
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client.print("<br>\r\n");
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client.print("</html>\r\n");
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}
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void printWifiStatus()
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{
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// print your WiFi shield's IP address
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IPAddress ip = WiFi.localIP();
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Serial.print("IP Address: ");
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Serial.println(ip);
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// print where to go in the browser
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Serial.println();
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Serial.print("To see this page in action, connect to ");
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Serial.print(ssid);
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Serial.print(" and open a browser to http://");
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Serial.println(ip);
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Serial.println();
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}
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